YG-1 BT series vanadium alloy HSS spiral flute tap for stainless steels upto 28HRc. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Hardslick coated. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. 0.354-inches thread length. Applications: Good for low carbon/free machining carbon steel, pure aluminum/aluminum alloys, pure and alloyed copper, free machining brass/alloyed brass, zine, magnesium. Excellent for medium to high carbon steel, free machining stainless steel.